Effects of Consolidation Pressure Increment Ratio on Secondary Compression

An experimental study of secondary consolidation characteristics is described. It is observed that secondary compression is dependent on the amount of pressure increment and pressure increment ratio. The relative magnitudes of primary and secondary compressions vary with the amount of pressure increment, and the shape of the consolidation-time curve is markedly influenced by the secondary compression behavior. A new theoretical analysis for evaluating the shape of consolidation-time curves is illustrated using the relationship between the degree of consolidation and time factor. The oedometer test results were compared with theoretical predictions.